What would cause my pink rhododendron flowers to turn pale pink or white?

Question

The rhododendron has always been a deep pink/rose color. This year some of the flowers are close to white in color.

Answer 1

Sometimes this can happen over time as a plant ages. These two articles will help:

https://www.gardeningknowhow.com/plant-problems/environmental/fixing-color-faded-flowers.htm

https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm